A Brake Warning Lamp on the Dash Remains on Whenever

A brake warning lamp on the dash remains on whenever the ignition is on. If the wire to the pressure differential switch (usually a part of the combination valve or built into the master cylinder) is unplugged, the dash lamp goes out. Technician A says that this is an indication of a fault in the brake hydraulic system. Technician B says the problem is probably due to a stuck parking brake cable switch. Who is right?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Correct Answer:

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